Summary: <p><span style="font-size: 14pt; line-height: 115%; font-family: Calibri, sans-serif; color: #222222; background-position: initial initial; background-repeat: initial initial;">A teeny-tiny form of pollution is threatening the Great Lakes. Minuscule plastic beads are used in hundreds of products, like body scrubs and toothpaste. And they're too small to get completely filtered out by sewage treatment plants. We talk to a researcher who's spent the last two summers trolling the lakes for the pollution, and found the beads in all five. </span></p>
